ios 判断邮箱是否正确
- (BOOL)isValidateEmail:(NSString *)Email
{
NSString *emailCheck = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",emailCheck];
return [emailTest evaluateWithObject:Email];
}